## How do you find the zero error in a micrometer screw gauge?

To find positive zero error, note the division on the circular scale (C.S.R.) coinciding with the line of the main scale line. Then the positive error is equal to the product of the number of divisions on a circular scale matching with the main scale line and the least count of the micrometer screw gauge.

## What is the zero error of the micrometer?

Zero error in micrometer occurs when zero on the thimble and datum line on sleeve do not coincide when measuring faces are in contact.

What is zero error of a screw gauge?

On bringing the flat end of the screw in contact with the stud, the zero mark of the circular scale coincides with the zero mark on the base line of the main scale, the instrument is said to be free from zero error. Otherwise, an error is said to be there.

### What is the value of zero error?

Positive zero error refers to the case when the reading of the scale is a positive reading away from the actual reading of 0.00 mm. If the reading is 0.20 mm, the zero error is referred to as +0.20 mm.

### What is zero error of screw gauge how it can be corrected?

When the circular scale of the screw gauge is rotated to maximum capacity and if the reference line on the main scale coincides with the zero of the circular scale there is no error on the screw gauge. If the zero on the circular scale is below the reference line then the error is positive.

Why is zero error positive or negative?

Zero error positive: Positive zero error refers to the case when the jaws of the vernier caliper are just closed and the reading is a positive reading away from the actual reading of 0.00 mm. If the reading is 0.10 mm, the zero error is referred to as +0.10 mm.

#### What is an example of a zero error?

Answer: It is a type of error in which an instrument gives a reading when the true reading at that time is zero. For example needle of ammeter failing to return to zero when no current flows through it.

#### What are the types of zero error?

There are two types of zero error when it indicates behind the zero position then negative zero error and opposite when indicated on the other side of zero.